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Brij Raj Kishore
Asked: 2020-01-23 00:47:18 +0800 CST

oracle jdk 13 installed but not working

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I have installed Oracle JDK 13 using the .deb file given on their official website .

But when I run the java command, it is showing:

Command 'java' not found, but can be installed with:
sudo apt install default-jre            
sudo apt install openjdk-11-jre-headless

What should I do?

java deb jdk oracle

1 Answers

  1. Best Answer

    The package jdk-13.0.2_linux-x64_bin.deb installs to /usr/lib/jvm/jdk-13.0.2/bin/{java, javac, ....}, I.e. to use the oracle java, you will have to setup an "/etc/alternatives" link to a system PATH :

    sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk-13.0.2/bin/java 2000
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk-13.0.2/bin/javac 2000

    And when that is done you can select the preferred java version (If more than one version is installed) :

    sudo update-alternatives --config java
sudo update-alternatives --config javac
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